The research group Optical Communication Systems investigates new technologies to improve performance of free-space optical links between ground stations, aircraft, satellites, etc. For the design of a particular communication link, good understanding of the propagation channel is necessary. For the satellite-ground link, the inner-atmospheric path is of major concern since it highly influences the e.-m. wave due to random fluctuations of index of refraction referred to as atmospheric turbulence. The propagating wave experiences wave-front distortion and self-interference leading to far-field intensity speckle pattern. In the framework of this thesis, a study shall identify the status-quo of atmospheric turbulence modelling (structure parameter, inner and outer scale profiles) options. The models shall be tested and assessed with respect to realism, applicability, advantages and drawbacks by calculation of particular channel parameters. The most promising one shall be identified and further developed as possible.
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